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Molecular Polarity

Q. Which of the following molecules contains polar covalent bonds but is NOT itself a polar molecule?

Solved • Oct 15, 2019

Molecular vs Electron Geometry

Q. What is the geometry around the left-most carbon in the molecule CH2CHCH3? a) tetrahedral b) trigonal planar c) linear d) trigonal pyramid

Solved • Oct 15, 2019

Dimensional Analysis

Q. How many fluid ounces of the drink must be consumed to provide a normal adult with the minimum daily requirement of ascorbic acid(vitamin C)? You will have to find the present daily requirement is. There was 3.24 mg of ascorbic acid in the 10.00 mL juice drink. I found the daily requirement for an adult male is 90 mg so I did, 90mg(10ml/3.24mg)(1fluid ounce/29.6ml)=9.38 fluid ounces, but I would like some help with this.

Solved • Oct 18, 2019

Limiting Reagent

Q. 1) When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced. CaCO3(s)+2HCl(aq)⟶CaCl2(aq)+H2O(l)+CO2(g) a). How many grams of calcium chloride will be produced when 26.0 g of calcium carbonate is combined with 13.0g of hydrochloric acid? b) Which reactant is in excess: CaCO3 or HCl? c) How many grams of the excess reactant will remain after the reaction is complete?

Solved • Oct 18, 2019

Molecular vs Electron Geometry

Q. Determine the molecular geometry of the ion NO2^-. a) linear b) trigonal pyramidal c) none of these d) trigonal planar e) bent or angular

Solved • Oct 15, 2019

Born Haber Cycle

Q. Identify the name of the enthalpy change for each reaction. M(s) --> M(g) 1/2 X2(g)--> X(g) M(g) --> M^+ +e- X(g)+ e- --> X^-(g) M^+(g) + X^-(g) --> MX (s) Overall reaction

Solved • Oct 18, 2019

Dilution

Q. Calculate the volume of concentration hydrochloric acid that the chemist must measure out in the second step. Round to two sig figs only for answer

Solved • Oct 18, 2019